discharge questions- 11 weeks pregnant

Hi,
I've posted this already today but unfortunately didn't receive a single response. 
I'm 11 weeks pregnant and have been having this discharge for about 3 weeks. Since it started I've had a scan and baby's fine. 
I'm just wondering if any of you have had something similar whilst pregnant? I have no idea what it could be. It's not always there it's on and off.